// instance.h : Global state functions.
//

/**
*    Copyright (C) 2008 10gen Inc.
*
*    This program is free software: you can redistribute it and/or  modify
*    it under the terms of the GNU Affero General Public License, version 3,
*    as published by the Free Software Foundation.
*
*    This program is distributed in the hope that it will be useful,
*    but WITHOUT ANY WARRANTY; without even the implied warranty of
*    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*    GNU Affero General Public License for more details.
*
*    You should have received a copy of the GNU Affero General Public License
*    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*
*    As a special exception, the copyright holders give permission to link the
*    code of portions of this program with the OpenSSL library under certain
*    conditions as described in each individual source file and distribute
*    linked combinations including the program with the OpenSSL library. You
*    must comply with the GNU Affero General Public License in all respects for
*    all of the code used other than as permitted herein. If you modify file(s)
*    with this exception, you may extend this exception to your version of the
*    file(s), but you are not obligated to do so. If you do not wish to do so,
*    delete this exception statement from your version. If you delete this
*    exception statement from all source files in the program, then also delete
*    it in the license file.
*/

#pragma once

#include "mongo/client/dbclientinterface.h"
#include "mongo/db/curop.h"
#include "mongo/db/dbmessage.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/storage_options.h"

namespace mongo {

    extern std::string dbExecCommand;

    /** a high level recording of operations to the database - sometimes used for diagnostics 
        and debugging.
        */
    class DiagLog {
        std::ofstream *f; // note this is never freed
        /* 0 = off; 1 = writes, 2 = reads, 3 = both
           7 = log a few reads, and all writes.
        */
        int level;
        mongo::mutex mutex;
        void openFile();

    public:
        DiagLog();
        int getLevel() const { return level; }
        /**
         * @return old
         */
        int setLevel( int newLevel );
        void flush();
        void writeop(char *data,int len);
        void readop(char *data, int len);
    };

    extern DiagLog _diaglog;

    void assembleResponse( OperationContext* txn,
                           Message& m,
                           DbResponse& dbresponse,
                           const HostAndPort &client,
                           bool fromDBDirectClient = false );

    void maybeCreatePidFile();

} // namespace mongo
